Premonition ~ Murder Device of Horror Loved by the Beautiful Wife

An ordinary guy who doesn't have much physical appeals to others had just married a beautiful woman, and when another pretty woman flirted with him, he completely got carried away and cheated on his newly-wedded wife. Now the mistress demands that he divorce his wife or she will hang herself, which she did and died across the street in the building where the guy was able to see her through his window. Police came, news got spread, and the beautiful wife learned about the mistress and left the guy. It is a common love-triangle-gone-bad situation, only that the guy claims that he had seen somebody trying to hang herself in the exact same manner in the exact same unit across the street only a week ago. What did he really saw? Or does he really have the ability of premonition?